Menu: File→Data Files→Allow non-numeric data
Put a check mark next to Allow non-numeric data if you have non-numeric data such as censored data (Example 32) or ordered-categorical data (Example 33).
Also, put a check mark next to Allow non-numeric data if you are using Bayesian estimation and you want to view posterior predictive distributions of missing data values.
If you put a check mark next to Assign cases to groups in order to do mixture modeling, the program will automatically put a check mark next to Allow non-numeric data.
Programming
To obtain a reference to this check box in an Amos program, use the method GetCheckBox("Dbfile", "CheckDataScalingOptions").